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EP0285688B1 - Chauffage pour la busette d'aspiration d'une machine de coulée à dépression - Google Patents

Chauffage pour la busette d'aspiration d'une machine de coulée à dépression Download PDF

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Publication number
EP0285688B1
EP0285688B1 EP87105126A EP87105126A EP0285688B1 EP 0285688 B1 EP0285688 B1 EP 0285688B1 EP 87105126 A EP87105126 A EP 87105126A EP 87105126 A EP87105126 A EP 87105126A EP 0285688 B1 EP0285688 B1 EP 0285688B1
Authority
EP
European Patent Office
Prior art keywords
suction tube
section
heating
heater
heating coils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87105126A
Other languages
German (de)
English (en)
Other versions
EP0285688A1 (fr
Inventor
Wilfried Schwab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Vereinigte Aluminium Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Mueller Weingarten AG, Vereinigte Aluminium Werke AG filed Critical Maschinenfabrik Mueller Weingarten AG
Priority to AT87105126T priority Critical patent/ATE58497T1/de
Priority to DE8787105126T priority patent/DE3766363D1/de
Priority to EP87105126A priority patent/EP0285688B1/fr
Publication of EP0285688A1 publication Critical patent/EP0285688A1/fr
Application granted granted Critical
Publication of EP0285688B1 publication Critical patent/EP0285688B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D35/00—Equipment for conveying molten metal into beds or moulds
    • B22D35/06—Heating or cooling equipment

Definitions

  • the invention relates to an intake manifold heater for the intake manifold of a vacuum pressure die-casting machine, in which the intake manifold has a lower pipe section surrounded by an electrical heater, which is fixed with a subsequent upper suction pipe section, which is carried in a mounting opening of a receiving flange and is also provided with an electric heater connected is.
  • the object of the invention is to develop an intake manifold heater of the type mentioned in the introduction, in which particularly effective heating is also achieved in the head region of the intake manifold with simple means and with good economy.
  • the part facing the casting chamber is designed in the form of a pipe socket, to which, with the formation of a circumferential annular gap, a holding flange which widens bell-shaped in cross section and radially partially overlaps this pipe socket, which is held with its outer surface in the holder opening of the receiving flange and is firmly connected at its lower end to the lower intake pipe section, and that the heating spirals extend around the upper intake pipe section into the annular gap.
  • a cover sleeve made of insulating material, which is attached to the outside of the heating spirals, is preferably provided as the insulating protective layer.
  • the circumferential annular gap is also formed with a cross section widening upwards.
  • the measures according to the invention create a suction tube heating which is very effective right into the head region of the intake manifold, without any significant and undesirable heat being emitted to the outside, in particular towards the receiving flange, and in addition there is an over the entire length of the intake manifold surprisingly good temperature control can be achieved with relatively little effort.
  • connection head the upper intake manifold section
  • the inner diameter of the bell-shaped widening holding flange is very particularly preferably larger than the outer diameter of the heating spirals at every point at which it covers the inner heating spirals on the outside (i.e. there is always an additional radial between the outer diameter of the heating spirals and the inner surface of the bell-shaped section Gap kept clear).
  • the outwardly insulating protective layer is preferably provided into the area of the annular gap, with, again preferably, the annular gap around the heating spirals being completely filled with insulating material. It is again advantageous here if the covering sleeve made of insulating material partially projects into the annular gap with its lower end region, the radial outer surface of the projecting section being designed accordingly and bearing against the bell-shaped holding flange.
  • the outer and inner boundary surface of the bell-shaped widening retaining flange is very particularly preferably spherical, the radius of curvature of the inner boundary surface being smaller than that of the outer boundary surface, i.e. the cross-section of the bell-widening retaining flange becomes thicker with increasing distance from its mouth at the pipe socket .
  • the insulation to the outside becomes the holding flange, via which the heat losses become Mounting flange take place, always better.
  • the bell-shaped, upward-widening holding flange usually sits in a receiving opening of the receiving flange, which in turn is also spherical, but with a larger radius, this further leads to the support or contact surface of the bell-shaped widening holding flange on the the heat losses can occur, relatively high up on the holding flange and thus in an area in which the insulation layer between the holding flange and the internal heating spirals spanned by it is already particularly thick.
  • the insulating protective layer arranged radially on the outside around the heating spirals of the upper intake manifold section consists of insulating heat-resistant mats, preferably asbestos mats, or of ceramic or special ceramic material, such as in particular silicon nitride, silicon carbide, aluminum nitride, silicon oxide or circonium oxide. consists.
  • the heating circuits of the electric heating of the upper and lower intake manifold sections are carried out separately from one another, so that, in contrast to gas heating, a targeted and controlled different heating of the upper and lower intake manifold sections is possible, which permits , not only to optimally temper the suction pipe over its length, but also to optimize (thereby) the energy consumption.
  • a further preferred embodiment of the intake manifold heater according to the invention is that the heating spirals also bear directly on the outer circumference of the intake manifold at the lower intake manifold section and are held on their outside by means of a clamping ring.
  • the clamping ring is preferably made of insulating material, in particular again of heat-resistant insulating mats, such as asbestos mats, or of ceramic or special ceramic material (as already mentioned in detail above).
  • a slotted clamping sleeve is also preferably provided as a clamping ring, which, for. B. can be made of a suitable metallic material.
  • heating coils in the form of tubular heating elements are very particularly preferably used in the intake manifold heater according to the invention.
  • the heating coils on the upper intake manifold section abut at their axial upper end against an end ring made of a material of good thermal conductivity, preferably copper or another good thermally conductive material. This is because good thermal conductivity is desirable on its axial end face on the side facing the casting chamber in order to ensure good heating at the point of introduction into the casting chamber.
  • FIG. 1 a sectional view through an intake manifold heater according to the invention is shown with an upper intake manifold section 1 and a lower intake manifold section 2 firmly connected to it (the latter being shown only in its upper part).
  • the upper section 1 of the suction pipe is intended to be connected to the casting chamber (not shown in the figure).
  • the extension of the lower intake pipe section 2 leads to the melt of the light metal to be cast, into which it is immersed (not shown in the figure).
  • the upper intake pipe section 1 and the lower intake pipe section 2 are firmly connected to one another, for example by welds 3.
  • the lower intake manifold section 2 is provided on its outer circumference with heating spirals 4 which bear directly against its outer circumference and are connected to an electrical energy source via a connection 5 (shown only in principle).
  • the upper intake pipe section 1 consists of an upper section in the form of a pipe socket, which is followed at the bottom by a holding flange 8 which widens outward in a bell-shaped manner and which is in turn held in a receiving opening 13 of a receiving flange 10.
  • An annular gap 12 is formed between the inner boundary surface 17 of the holding flange 8, which widens upward in the shape of a bell, and the outer surface of the upper region of the upper suction pipe section 1, which is designed as a pipe socket and has an increasing cross section (with increasing outer radius) with increasing distance upwards.
  • the holding flange 8 is provided with an outer surface 16 and an inner boundary surface 17, both of which are formed in the shape of a spherical segment. However, the radius of curvature of the inner boundary surface 17 is smaller than that of the outer boundary surface 16.
  • the upper intake manifold section 1 which is designed as a pipe socket, there are arranged electrical heating coils 6 which extend axially largely over the length of the pipe socket and extend into the annular gap 12, the heating coil lying most axially in the annular gap 12 only slightly from Mouth area of the retaining flange 8 is removed in the pipe socket.
  • a cover sleeve 9 made of insulating material is pushed onto the heating spirals 6. With its lower end region 15 protrudes this cover sleeve 9 somewhat into the annular gap 12, the outer surface 14 of this end region 15 of the cover sleeve 9 being designed corresponding to the inner surface 17 of the holding section 8, so that the outer surface 14 of the cover sleeve 9 and the inner surface 17 of the holding flange 8 abut one another.
  • the still free space within the annular gap 12 is completely filled with an insulating material 11, so that the heating coil 6 is insulated radially outwards over the entire axial extent of the upper intake pipe section 1.
  • the volume of the annular gap 12 widening towards the top achieves an insulating layer radially thickening from the lowest heating coil upwards, so that precisely in the level position of the contact area 20 between the holding flange 8 and the receiving opening 13 of the receiving flange 10, at which Place the heat emission from the holding flange 8 to the receiving flange 10 is cheapest, there is a particularly thick insulating layer.
  • the heating spirals 6 are connected to an electrical energy source at the upper intake manifold section 1 via a separate connection 7, which is preferably a heating circuit separate from the heating circuit at the lower intake manifold section 2.
  • the heating coil formed from the heating coils 6 bears against an end ring 19 made of a material of good thermal conductivity, such as copper, the task of which is to heat the heating coils 6 to the adjacent area of the casting chamber when the upper intake pipe section is connected to the casting chamber to transmit and thus to ensure sufficient heating of the protruding small end section of the upper intake manifold section 1 also in the transition area.
  • the heating spirals 4 are preferably also surrounded on their radially outer side by an insulation layer 21, which can in particular consist of heat-resistant mats.
  • an insulation layer 21 which can in particular consist of heat-resistant mats.
  • this adapter sleeve which is provided with a small slot, can be clamped by suitable side flanges and thus ensures that the heating coils 4 are pressed particularly firmly against the outer surface of the lower suction tube section.
  • an insulating intermediate layer 21, for example in the form of asbestos-containing mats is still interposed between the clamping sleeve 18 and the outer region of the heating spirals 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)
  • Furnace Details (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Pipe Accessories (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (14)

1. Chauffage du tube d'aspiration d'une machine de coulée sous pression et sous vide dans lequel le tube d'aspiration comporte une section de tube (2) inférieure, entourée par un chauffage électrique (4) et qui est reliée de manière fixe à une section de tube d'aspiration (1) supérieure, se raccordant à la première, supportée dans une ouverture de support (13) d'une bride de logement (10), également pourvue d'un chauffage électrique (6, 7), caractérisé en ce que le chauffage électrique (6, 7) comporte des spirales chauffantes (6), s'appliquant sur la section de tube d'aspiration (1), directement sur son pourtour extérieur et en ce qu'une couche de protection (9, 11), isolante vers l'extérieur, est prévue radialement à l'extérieur des spirales chauffantes (6), en ce que la section de tube d'aspiration (1) est configurée, dans sa partie supérieure, sous la forme d'une tubulure à laquelle se raccorde, en bas, en formant une fente annulaire (12) continue, une bride de maintien (8), de section transversale en cloche, s'élargissant vers le haut, recouvrant en partie radialement vers l'extérieur la tubulure, laquelle bride de maintien repose, par sa face extérieure, dans l'ouverture de support (13) de la bride de logement (10) et est reliée à son extrémité inférieure, avec la section de tube d'aspiration (2) inférieure, et en ce que les spirales chauffantes (6) s'étendent autour de la section de tube d'aspiration (1) supérieure, jusque dans la fente annulaire (12).
2. Chauffage de tube d'aspiration selon la revendication 1, caractérisé en ce qu'on place un manchon de couverture (9) en matériau isolant, sur les spirales chauffantes (6), pour servir de couche de protection isolante.
3. Chauffage de tube d'aspiration selon la revendication 1 ou 2, caractérisé en ce que la section transversale de la fente annulaire (12) continue s'élargit vers le haut.
4. Chauffage de tube d'aspiration selon la revendication 2 ou 3, caractérisé en ce que le manchon de couverture (9) isolant vers l'extérieur est prévu jusque dans la région de la fente annulaire (12).
5. Chauffage de tube d'aspiration selon l'une des revendications 1 à 4, caractérisé en ce que la fente annulaire (12) est totalement remplie d'une masse isolante (11), autour des spirales chauffantes (6).
6. Chauffage de tube d'aspiration selon la revendication 4 ou 5, caractérisé en ce que le manchon de couverture (9) en matériau isolant pénètre, par sa région terminale inférieure, partiellement dans la fente annulaire (12), la face extérieure (14) radiale de la section (15) pénétrant à l'intérieur, étant configurée comme la contre-surface intérieure (17) de la bride de maintien (8) en cloche et s'appliquant contre celle-ci.
7. Chauffage de tube d'aspiration selon l'une des revendications 3 à 6, caractérisé en ce que la surface de délimitation extérieure et intérieure (16, 17) de la bride de maintien (8), s'élargissant en cloche, a la forme d'une portion de sphère, le rayon de courbure de la surface de délimitation intérieure (17) étant inférieur à celui de la surface de délimitation extérieure (16).
8. Chauffage de tube d'aspiration selon l'une des revendications 1 à 7, caractérisé en ce que la couche de protection (9, 11), placée radialement à l'extérieur, autour des spirales chauffantes (6) de la section de tube d'aspiration supérieure (1), est en mats isolants, résistant aux hautes températures, ou en céramique.
9. Chauffage de tube d'aspiration selon l'une des revendications 1 à 8, caractérisé en ce que le chauffage électrique (4, 6) de la section supérieure (1) et de la section inférieure (2) du tube d'aspiration présente des circuits de chauffage séparés.
10. Chauffage de tube d'aspiration selon l'une des revendications 1 à 9, caractérisé en ce que pour la section de tube d'aspiration inférieure (2) aussi, les spirales chauffantes (6) reposent directement sur le pourtour extérieur du tube d'aspiration (2) et sont maintenues sur leur face extérieure, au moyen d'une bague de serrage (18).
11. Chauffage de tube d'aspiration selon la revendication 10, caractérisé en ce que la bague de serrage (18) est en matériau isolant, en particulier en mats isolants, résistant aux hautes températures.
12. Chauffage de tube d'aspiration selon la revendication 10 ou 11, caractérisé en ce qu'on prévoit comme bague de serrage, une douille de serrage (18) fendue.
13. Chauffage de tube d'aspiration selon l'une des revendications 1 à 12, caractérisé en ce qu'on utilise comme spirales chauffantes, des corps chauffants tubulaires (4, 6).
14. Chauffage de tube d'aspiration selon l'une des revendications 1 à 13, caractérisé en ce que les spirales chauffantes (6) de la section de tube d'aspiration supérieure (1) s'appliquent, par leur extrémité axiale supérieure, contre une bague de fermeture (19) réalisée dans un matériau bon conducteur de la chaleur, de préférence en cuivre.
EP87105126A 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression Expired - Lifetime EP0285688B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT87105126T ATE58497T1 (de) 1987-04-07 1987-04-07 Saugrohrheizung fuer das saugrohr bei einer vakuum-druckgiessmaschine.
DE8787105126T DE3766363D1 (de) 1987-04-07 1987-04-07 Saugrohrheizung fuer das saugrohr bei einer vakuum-druckgiessmaschine.
EP87105126A EP0285688B1 (fr) 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87105126A EP0285688B1 (fr) 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression

Publications (2)

Publication Number Publication Date
EP0285688A1 EP0285688A1 (fr) 1988-10-12
EP0285688B1 true EP0285688B1 (fr) 1990-11-22

Family

ID=8196905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105126A Expired - Lifetime EP0285688B1 (fr) 1987-04-07 1987-04-07 Chauffage pour la busette d'aspiration d'une machine de coulée à dépression

Country Status (3)

Country Link
EP (1) EP0285688B1 (fr)
AT (1) ATE58497T1 (fr)
DE (1) DE3766363D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3903210C1 (fr) * 1989-01-31 1990-06-28 Mannesmann Ag, 4000 Duesseldorf, De
CN102513517B (zh) * 2011-12-23 2013-12-11 华南理工大学 一种分段可拆式间接挤压铸造合金熔体的输料管道
CN108655366A (zh) * 2018-07-04 2018-10-16 中信戴卡股份有限公司 一种升液管法兰加热装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195360A (en) * 1938-12-02 1940-03-26 John R Daesen Die casting apparatus and method
GB735155A (en) * 1953-06-26 1955-08-17 Dow Chemical Co Apparatus for delivering metered shots of molten metal for castings
US3447593A (en) * 1967-05-25 1969-06-03 Mt Vernon Die Casting Corp Apparatus for die casting
DE3041340A1 (de) * 1980-11-03 1982-05-13 Maschinenfabrik Weingarten Ag, 7987 Weingarten Druckgiessverfahren zur herstellung von gasarmer, porenarmer und oxydarmer gussstuecke sowie druckgiessmaschine zur durchfuehrung des verfahrens

Also Published As

Publication number Publication date
DE3766363D1 (de) 1991-01-03
ATE58497T1 (de) 1990-12-15
EP0285688A1 (fr) 1988-10-12

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